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A zoologist measured the weights of 11 hummingbirds on an island and found the average weight of these birds was 3.65 grams with a sample

A zoologist measured the weights of 11 hummingbirds on an island and found the average weight of these birds was 3.65 grams with a sample standard deviation of 0.33 grams. The population weight distribution is assumed to be "mound-shaped." Given this information, estimate the average weight of hummingbirds with a margin of error at the 90% confidence level, to the nearest hundredth.

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